libbpf-tools/memleak: Add verbose option (iovisor#4899)

Add -v(--verbose) option to display libbpf log

Co-authored-by: Eunseon Lee <[email protected]>

libbpf-tools/memleak.c

@@ -198,6 +198,7 @@ static const struct argp_option argp_options[] = {
  {"max-size", 'Z', "MAX_SIZE", 0, "capture only allocations smaller than this size"},
  {"obj", 'O', "OBJECT", 0, "attach to allocator functions in the specified object"},
  {"percpu", 'P', NULL, 0, "trace percpu allocations"},
+ {"verbose", 'v', NULL, 0, "verbose debug output" },
  {},
 };
 
@@ -541,6 +542,9 @@ error_t argp_parse_arg(int key, char *arg, struct argp_state *state)
  case 'P':
  env.percpu = true;
  break;
+ case 'v':
+ env.verbose = true;
+ break;
  case ARGP_KEY_ARG:
  pos_args++;